ever since 4.0b I have been having one hell of a time with my AMD rig.
I use Minerstat OS (linux based) and when they update a client its only that version available.
ever since 4.0b I have had "newer" cards have issues with stability and the OC/UV settings. I have RX 470/570/480's and the only ones I can get to work fine are 2 older 470 mining 4gb and 1 570 4gb. all the newer 570 gaming x, 480's and brand new 470 mining 8gb models all perform erratic and at low hashrate. the -altinit helps on the brand new 470 8gb models to get from 26ish mh to 29's but my OC/ UV settings are all off i cant push it nearly as far as i used to or as I can on a windows unit with 1 card. even on my windows test bench I have erratic behavior and messed up OC/UV on some cards, but not on others.

green kernels makes the new 470 8gb cards start off good but then plummet to 12ish mh. while the older 2- 470 and 1- 570 continue in the 29's..
nothing makes sense and I cant seem to get a single stable and repeatable group of settings together. what works once doesnt work again after a reboot.

before all this I had 4 cards running smoothly and with great OC/UV settings 1 card being a 480 8gb that now I have issues with.

is there something that Im missing? something that I should be trying? ive been messing with the optimized kernels but again I cant seem to find a stable repeatable situation.

thank you for any help

oh and I randomly get the "fatal error debugger detected" error some times it takes a couple reboots to clear it other times its fine